I was kinda wondering the same thing.. but I think the EWCM will be more of a jelly like substance. Are you checking your CM correctly? My TTC buddy told me that you are suppose to use your index AND pointer finger, then find your cervice and kinda pinch between the two.. this way you get more CM out. If this comes directly from your cervix, I think it should be CM and not sperm. But I am not sure, sorry I cant be of more help.. I just know that my CM is a jelly like substance almost.